If you don't have the air box sealed properly it can lean bog from sucking air.Dirt Cheap Yamaha, Polaris, Suzuki & Kawasaki OEM Parts & Accessories – Cycle Parts Warehouse If you have doubts on the carb either rebuild it or have it looked at.Shindy Carb Carburetor Repair Kit 03 408 | eBay

 

ok im gunna get the air box seal and carb kit for sure can u recommend a clutch rebuild kit .. and also my spark plug keeps going black i clean it with a wire brush but after a couple idles it goes right back..dont know if that has anything to do with it

 

Black is usually because of too much fuel,running rich.Either the needle and seat are worn,float level off,etc. Plus don't reuse plugs like this! They can partially foul and cause problems. Use only NGK BKR5ES or 6ES plugs. Here's the best post I've found on BST40 carbs. Similar to yours but used on a Ktm. Float level setting is critical as it shows this among other things in the pictures.The BST-40 Bible | Adventure Rider Plus here's the pdf fuel section from the manual on carbs that includes yours.https://www.google.com/url?sa=t&rct=...U2gGlaHJWSIlbA

 

ok sounds good thanks ill save that link for when kit comes in ... can you recommend a clutch rebuild kit for the scrambler ? ive looked on ebay and came up with 1 kit that only had buttons for 13 bucks but id like a ful rebuild kit

 

Epi has kits including bushings for front and rear.Epi Secondary Clutch Rebuild Kit WE213215 | eBay Epi Primary Clutch Rebuild Kit WE210165 | eBay I'd check these against individual parts prices from Dirt Cheap Yamaha, Polaris, Suzuki & Kawasaki OEM Parts & Accessories – Cycle Parts Warehouse

 

ok thanks youv told me everything i need to know for now thank you
ill update when i rebuild the carb with the kit you showed me if still bogging will msg back

1 quick question so when you said the cam looks ok is the cam and rockers rulled out ? or can it still be the problem ?

 

and one other thing lol..
my carb leaking alot of gas from the drain at the bottom the screw is tight but the gas just drips out the bottom alot like every time i go in the shed it has a little puddle on the bak of the engine could that be bad ? plus my plug is blaccker then helll again could i be to rich causing it to bog >? orr

 

Carb kit with new needle and seat along with making sure float is adjusted right should solve this along with plug turning black from too much fuel..

 

ok .. do you think maby i could be having electrical issues ? since my spark is orange and i seen you in another post some one made along time ago about somthing in the cdi mesing up and causing the kill switch to go bad ... and another about the ETC .. also i my primary has deffinetly been hitting the clutch cover in the past the cover is all torn up inside it and cracked it looks like some 1 melted some plastic on the inside to try and fix the big cracks in it .. my belt also dosent look the greatest kinda looks like the teeth are starting to go down and a couple r melted .. aslo primary is smooth as glass where the belt rides on i seen its suposed to be roughed up .. just looking for some other issues to fix while i wait for carb parts and air box seal ...

 

You're getting too far ahead of yourself!! Fix what you know is wrong first:carb and clutches,possibly new drive belt. Then concentrate on electrical if problem persists. It's called process of elimination..